Trig basics

Triangle and ​Trig basics

By Benedict Sewell

Multiple Choice

Which is the hypotenuse?

• a

• b

• c

• α

Multiple Select

Which are the legs?

• a

• b

• c

• α

Multiple Choice

Which picture best represents two people opposite to each other?

Multiple Choice

Which picture best represents two people adjacent to each other?

(adjacent = next to)

Multiple Choice

So which side is opposite to the angle α?

• a

• b

• c

• α

Multiple Choice

So which side is adjacent to the angle α?

• a

• b

• c

• α

Multiple Choice

Which of these is the correct pneumonic for sine/cosine/tangent?

• SOH CAH TOA
• SAH COH TOA

• TOA CAO THH

• SAH TOH SOA

Multiple Choice

SOH
(Opposite over Hypotenuse)

Which fraction equals sin α ?

• b/c

• a/b

• a/c
• c/b

Multiple Choice

CAH
(Adjacent over Hypotenuse)

Which fraction equals cos α ?

• b/c

• a/b

• a/c
• c/b

Multiple Choice

How do we read
tg α
out loud?

(It's a trick question)

• "tan alfa"

• "tug alfa"

• "tog alfa"

• "tang alfa"

Multiple Choice

TOA
(Opposite over Adjacent)

Which fraction equals tg α ?

• b/c

• a/b

• a/c
• b/a

Multiple Choice

SOH CAH TOA

• b/c = tg α

• b/c = cos α

• b/c = ctg α

• b/c = sin α